Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1686d4d6da024affeba261a711dd21ddc060745efaa69289ba1fe25977897c9' 
  AND token = 'haMgYszdlZ0FExcmSKwbokF/TgFahoNmvhtTWlhb3PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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