Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eee5f8ca354c9077f66e3ee8660c5f8829fd7eae89f15609d36c5fd506869db' 
  AND token = 'bUJAtmH1uNJBnaY5IpN646B/eO4WSCiM2mGapRaz7tM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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