Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e8bfd4477699888e725bdfdc8b35b752be521e992b8eed5603bc3800fb8bad9' 
  AND token = 'rcHAtYqWoy65gPW4tVOOH6oHKKaIegHAnkkODqeyHqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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