Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f089e240561f31263f1eb0cbe643414ef05e317a67dbf4caf40b915aa3bdb2da' 
  AND token = '2yt+vV3yZtcRaAi5gVWyL9zqlnma48pcZfYGLpEkoCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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