Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a321bb60092e34cd674aa2072bd99cd6f7e3b34c3d537dea70aea50711e7c21b' 
  AND token = 'KhC/hQ6L1aZEdI51ov5Dc58LS3rkxaQZ4DBJ0nloKdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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