Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87162eef31e63eda0bb63f3ab5fc75fec8171a3aca1af482c6b564d093dca509' 
  AND token = 'bnQMAc/vsbXgSkapo8Wa2gbvKjU3DR0b+8seOrOf2Xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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