Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ce2cd3fff29c4e2be11e9eb2464b01bb740db3c9b24d8c38a9b02a915e2b8f7' 
  AND token = 'IWd8+kb/GIZin3tPK14oDk28SK85hS2FMkcRnwrHXN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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