Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3e893700994bf263ec98eda7fccb491ba1b7c67c98c2bb5b4f90ac3f1eb59cc' 
  AND token = 'L5tfs+h58x7TR7+tXEZgU20R/L7Sd8Ac8dbbwcPiOM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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