Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f86dd5d91001f72077b951e9f9e33cf6f2c0ec07430474c2290d9d8f2551a93' 
  AND token = 'nSFLedWcnieQIge3tF5+LSJtaaqQQ5JkK7PAYKR/DYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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