Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4b540d563b3782924045fbbf94a18cba22e6131fe3158a8f154ddf1b9eecdef' 
  AND token = 'jUyVKySodhdM1yCO9c/jC1rpfsOopX89ZEkg+gjSVoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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