Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddcc9b58dcae273556eee2122c7aab68b5255db5a6afa6ab345714de99e3cf52' 
  AND token = 'IZ45jur12yppOJ2/gIdhvHyWW5lXqnql4tM7hytsYJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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