Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0cf67ecd43c9c32b84ac662c1ba55a1a28d318514cf7123338666dde38fdaa9' 
  AND token = 'RXQmqOCLLN6hfEdmJhlrPi2Z0kE64QrkXp2PqNPKK18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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