Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f48e00104301e41b6425c6a5ea2eca46faf57a26f24af6119801429fb66d4ab' 
  AND token = 'LFHxfIstRWTWQLrnxISUHO61LUIDkQZChNhdIEtirzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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