Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0fad782fae306da8461a8b45e203bec5a88d8e6f0b6dcecbbdcf93d38b9ce429' 
  AND token = '6+VMuzL7jE/BLBH9L8JDsBeQhh1d/YystkdsapXS6c8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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