Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aba2b756374a046a76c0a2d1244e8861076a025728646633be448db9a2015461' 
  AND token = 'E2Hnp3iheNOTVS21UTL3QpCI/SxquT3EoCeroJszcG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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