Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a86370a65f22f089f60b4832524b724fccff6529381b021887550f57307c731' 
  AND token = '49GxuhiKcl5mxeI4KkZ3uU4Ig9EJAjQ5xtbjK2nzOWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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