Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d4757d72394d6a87b7ac5dfdc3d7da3542cf0db38cae21e2270c525c087867' 
  AND token = 'xOsrbFKesL8gOGptmYTCAEoWDgZ3tXYrvK1vwH1FuSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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