Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45bb6defd0aac136f8f10bb0ecf581aedb31d80cd3a87e24a59f52517707e1da' 
  AND token = 'sQ4lEWnmLCQERuZFOj+EX+YDxC1bM4bMViw0agYLUGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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