Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ce4fc014cb27b92efd8d0b13c3392b399bf1d989105d28d2b8fac215ee0eef' 
  AND token = '7ietg8dA2s6OlEUnQdmzS/Ehk4TqQFFj14MTNZaq8UI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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