Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '863eb2d86365f93bb0d5d1062c01a165270f1e5bbf15e814764c71ac9e1e63f0' 
  AND token = 'sP0AJYgn+xhA8gF2kZt0DoBCQVNbaePcNcqz8s/zWHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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