Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '32f024ea134fea8586e7b93c2f4672dde0e5d29486d858b682d5333261a10203' 
  AND token = 'R/mI3CxOM/ep9kyxcqWK6IdHSzxsmN4VHqm0xQ2RYiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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