Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2c5f93800305dc79e94299caa8540aecddbecfd03f8945e85691f7eae4f02c7' 
  AND token = '3d3K9l8vM7Hs+3NxTtgL7cHZxch7Kme49FP53yXkeTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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