Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '443042b76ad6cef578845567d8e9c69f6324f1fa4f35ba49c4effdace391484c' 
  AND token = 'bzPCJoDRdbY0T0S0gdQvlMZWt5ih3y+QWe4Y5r8X4j4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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