Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08969a8efa3bc0405f64f02aeedd66ffdf6f59e61ba86c71a41dd3f0f753d7b0' 
  AND token = 'nmrobkdNa6nJ82YruKv9bF28Td+xPZrCLNmP+mdPKD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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