Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc90993bfc97bc2a611e96c2d53d95437a2bb06b4e641a931bddf2fb414d3deb' 
  AND token = 'PtvHmDPFebc3q/dUwcTqlpS83dkwOJMQweQygAyVCos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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