Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a2c705b865d764d378b80e5ede3b05d6ee5e3df427abff79abbbf8e3ba1d9db' 
  AND token = 'lmC/+B6t+zuARaqKK2oUq3eQ9bCYGnU+EzxSNGm4Dls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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