Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a41cac4513c918a3f6e50e5cd2b378324a886fd38f7d646c69f106bcafe25d6' 
  AND token = 'NJN6d7yYc1o/vr6rAC9Iz03Zdfmhjx9T0UCW9kgs3iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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