Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a533fe8503e9009007528a0a269c3637e30a0133dae9964a106bdae0e8e7c88' 
  AND token = '9i1QEycFAqLbIzgbM0Ek4yvxi0cjiFfZuxgR34j//N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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