Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce15b9531c2a7ba41140a1be64631dcbfd8e228d04d31a04e8e8214f9d54a9eb' 
  AND token = 'qq10LFVaYaq5/qkakrvj6mySOpEx6OLrSDbMHcDPEhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}