Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19b7247a06ac814901db5720174ef28cdae0bb9e740bd39987d29a2731962323' 
  AND token = 'PO3YnTVQ8yx8htn9yKQ5pAyG6fR3va/RM1ow5rKsMYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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