Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfe9c73c66fa08f6accd0b49d84575753975f04fee43a2e86191d52cbd94c3df' 
  AND token = '3TZZKINE/qezTr3tpV8q42joxtj5+H0R1uNBOtBZjcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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