Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcc0d98edb59aa7207a88b487d25bef1a08a2674ac94038fa592b9a38424e65a' 
  AND token = '/p+u5DkvFIae6wP10awWP4M2N2GDz1r0hd8jnk7scFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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