Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bac4e9a4ac2e2145ee1c53b007418dd9a4ee5fd7b256da4e4a6e17fcf67c2567' 
  AND token = 'DaWDFIRdZhB0Xj1ZLRtKErMr7XwQ044C6Z4KxXo1uM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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