Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5655c7dd257a14df0b41e94eeb88ebf45b0c9f2f0ff7ad8107be4d4b66991591' 
  AND token = 'ZC3tAKxZDVieKaS61UP/XZsZLG5GDZ4FZzEI1YigFa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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