Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f3847351c5f0dda662e443e0752fe8cc7e9965bb4d7bf82f314e5b07540a418' 
  AND token = 'tNNfDRYvyW6hYn2p0UpYLdeF1dNIQYStZ7MGLe7eplc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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