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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32070156e2a65be3dc37d77d0c7a464f38a08e82547342e83ab2985dd3a90eca' 
  AND token = 'NIM3l3z38rMd0xO13x0mSaZInNx2j+4HHWUfcxa9FGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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