Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c419672fdd337fb8075415a9074acba96b5a3440d9d3a298d65eaa34320186' 
  AND token = 'YXx78OK4d/iXefZCQ7zMz3VrxD8AfukLzuMxU0aOAa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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