Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f5f0c14ddf74b0b72c03b69982b023b0e8dde548ea7f701c048000766b53cdda' 
  AND token = 'LHeUfuu19iOupMyXyWpmPcMyCOTZiMjrxkVKLanZ6wo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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