Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8830a788df026fc103e36444c1589a743907794e2e8314d858db8be74816048' 
  AND token = 'GVXljE0C1mVSK1DyrU/swHZtO3FjbPNeGyp4D3EhiZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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