Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15c1182fb413e0c853f4428d7958e96939bd97b103d312374753204c5dc23c67' 
  AND token = 'oU/ewvJxxvdDJ/p8iKjakIm+Boygc1xShcp05paQnUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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