Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '426dbf635b0d613b5912f57da309aacb5348ee72e1f6b0994adb400782b20eea' 
  AND token = 'mLWXfLQfH4GMImyiZPQnLD6Nbxb+w9fswBzrj/Trqu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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