Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db7a63ae3f49dc6a30bb7b47f5c698c458cf57cd3684ae927f9cf5d350778e5e' 
  AND token = 'xHtmm6YIrAO16usY7G4muUN3WGg71lF2Yok/bLZNR2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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