Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d829b67da8e447c64091bf1d63c53a08c3086cbf69cca28c84a1b705cd565e5' 
  AND token = 'EXkhEb3rLiRIG3lD6vwe3ST76x4/GysDoA7DrfeEb+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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