Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53eab4936799041899d00d790b3d5521aeae3d911522c665b37f97d2da657677' 
  AND token = 'zO7MeDv+s0JP2x8xqlWI/OTGpiiGIGu12QGSkA3SRZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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