Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f24cc6481fce294659a9323c1490baca1c2d9b342c24e184ee1ed37155af30bc' 
  AND token = '0KnPa5wzROqHOb7xSxr0bog2T5uTOhk+y/zORSOMCO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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