Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7640de238948c113308dc72405d8674e54637f9b007d3e5eb79a9affc9aba3a5' 
  AND token = 'd0OQZl00mqTkz/GJU4DQYSmeuD6Bwj0P99+rajXAl34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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