Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75be9fa53d7ae5bc008083d7c4b7d35c0722e562d79f527bd62f6595597316a2' 
  AND token = '+ZdXhpGNyjAHAQk+ZdlWcuMuxSQ569tFmAsX0YNQ8Pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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