Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ff1ed92df4d583d655452cc13134fa877239b0dfa223bb9ebdd9bb8db1fdf7' 
  AND token = 'KYlVcAGiMnwF1eArwsqW6MVSNIt43KHcaANfThYhCWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}