Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d8a5375591cc4e0263e941a97112af1ba6c97adb3ed7a00dbc9812db89d679a' 
  AND token = 'en5dPnVi8dM6+3FZrJy8Xrada4LCE+7nZGC2u/jri5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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