Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '503f0b10731d803008398844eaf0357f9ff1e89e9275173305938f58afca4dd4' 
  AND token = 'zhZiFKUS1ty5HIQkK6GIi+yMk413OMZCbztS8Os/xmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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