Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '466460127c7ade8bb543d6ce153967f4d69a129288de209afefdcf37b93a100e' 
  AND token = 'ZyXxkA+ZCsfzGjaatSaXPz/6yDR0P6xaBAMEZ29R+Ck=' 
  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"
    }
  }
}