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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3526cbd59e4753cae8cafd605a8b752548e1be3a95f16cbc7ac0cf06ed2563f1' 
  AND token = 'CWllNYc1JIzsJ21K5ymVOV+9WTenq1H5yr/Q6Q5b2ZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}