Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99c10cec262ceb321e02b18aa3051864bda31cde47020db5a6225157e787bd1c' 
  AND token = 'FeO5IiliF+scG5o81uBfQfD2hOLFUZC7+30JUJ9Kslk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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