Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5db236c1bc8ed103eec87538723daeaa777e7bf4fd090b2b677f92ce39a5239b' 
  AND token = 'cEz4+NQzR9p8s3bqLgGhjOvM0JLZNzWxx53l4CG5aJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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