Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c3a191916329813f3cb215161beb6ee694fbff9a3a24da0aef069a49d6e9f16' 
  AND token = 'HClQywIKLyp+wWZM+bgQnqsgm821eSLfC+WkgJ0gDfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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