Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'cbdc15708ec206280ee89fa2cae8db510cf45ccfd7c1c796283c7edb04e443a6' 
  AND token = 'IZRLzpLKjSxB5CoO5Ck8I6ublsr5jg+YauJG91A9rSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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