Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9acf2ac25f62ff671ba698f3f2f7f1469b92542c074ae4e442526d8ff97eaee' 
  AND token = '4Glu86X4Hy5W3++sml9OIne6J3Ocayzg9GwmQhAKXlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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