Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ab59c3a3cbdb4aff233a7b9514614bb6c953242d294178b3609185feb08cf5c' 
  AND token = 'u1KO4Yc77wA3auqLbvRGZQ1jEszQQtaruukzSn+a+NA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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