Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8fcf70d3a513e63de155e6f85a0a7ecd9ce35b161ca6ec50d6bd3f4edfd2885' 
  AND token = 'aRSJ7BiBqPJi2BQJd+lXpsdp+cvq0cws9pfwVp+LT4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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