Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f2ecb7b8a57cd08cff2f0b76d163af6fcfd723ba33455ddc4b867d8f7101421' 
  AND token = 'JtzP0ezSkReoAJszozSer5ML3XlkMLw03EDw4/H01jo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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