Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75725ea42684e2412a06e3f239f3e828538a6cff72b77a7f00776819936b5303' 
  AND token = 'H7rxg6Y3Rq8vbI1DzrOAAh6HkLMZLBwof5Ab7N4QW7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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