Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19857727e096406117c7cf949b113c7e1438af01c4466034e458d0bc44cfb2fc' 
  AND token = 'O8inurobnSSD5CGB2AUlbFp8qLOJ2I+KwlJ8RpglcJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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