Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9e0892afbac639aba3069d9ca22f77f66dbd5e90e7905714a58fc7aa095ab49' 
  AND token = 'ppN0hIkNiRJwP8VRNSBdEojudU/6MEO5ry1If5okf18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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