Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd71c4326c1440817a98555b16eeed52cfb8aa8316b08cf163bc12dc0bda8647f' 
  AND token = '5I5nQi2PYrgZlHn0X1m1kp+2g7vD+dzN7QfOLQYqx8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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