Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79545ba6173a274ea198bfdd62c04a81cd679ee0534dd1aa76fa1ed33d419660' 
  AND token = 'dl5MNBppqrFwseQNa/sO6JBcGPlAl+fqjg/P9/85hEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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