Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b39ebfc3241898a8485daec843567224c52a2e6897aee1f71d0fc52f006183d0' 
  AND token = 'aFMEPtv6mK5/tKUZZHdub1m/Kg4K8Y2lg5ej14jHZg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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