Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6b4802a59c13a97bae1b657865c05f413b22c7c7f8e35afac496f546418b85d4' 
  AND token = 'WoQVn/P1RCCK0peC79KIIyoRRf27Jt90WyHy/g5PrCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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