Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6916e80f1de2c00f8a63554973500c1d27023d10c9a7b9caf647b955bd608b3a' 
  AND token = 'ND1B1EEl0t/+Tv3Pj+suBzxSyQpzZepX7L4gXQssyMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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