Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9bf20dcd93af7aff99b16e9473eb4d86c6890afaea51c40909d5954dddc783d' 
  AND token = 'hstQFGYBIHtWI5d/T9Oy58L6Nm7/ASetuLIfsOKvOt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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