Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5572d54a6abd6cc61dde75af6661aad4543679ad85d1c428d6c78dcfb2fd79c4' 
  AND token = 'K2RVzB2DuzdpcIrx0NbF51HfCyHUdT1Gzo8DngC+S24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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