Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aada3e3c71d386443b54d5d07704f040505867218329919410e1666ef437e038' 
  AND token = 'BWln8VC7cbjukD+pLkNL4pBMy6qDDC8j21ZfP5wDKm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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