Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09ba4871493935be0788ce87a0d9cda98627ee1e38ac07ac3beb4950d1e0fb78' 
  AND token = 'sIpdAnASFVPJzhzuPYfHUKvzhXcPqosT3verYzn+ya4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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