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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b7924848f1302c193eae7b602e345f17f3721c248749999bdee83a40c8bf99' 
  AND token = 'i4RutgVU0Nzdi9iCLSvg3YY6xpMIa6CzrOaVfCvpeRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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