Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d3b0057750dd559bdc13cc6f524f93724b4f765532d55f4f3b3c0441b13122d' 
  AND token = 'CMmZwImEmzpe6VObWyAC/NAwBIhpz9EO4TjlqGipN7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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