Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c1ce0d941babfb07cd9f2eb23d25c9c4e70657414ed87e53e3f1939598b2fea' 
  AND token = 'cWwYkvAgyJcnL9RmeJxVGqwUPnM1ZMObobsuIJPp2i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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