Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddc41a3e541ba14adaf980b1f2e9ed949abad5c06dc6a229581ec5848d14416e' 
  AND token = 'VAtYLqALMkHpPcVJeYK5oNU7gWpNHJIkkIRiwGS2CSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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