Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '261f44c2f2796a6e39b442a5a703d96879cf0a3393f38ddbe95cc8bdea269fb2' 
  AND token = '15a2Frveiux1GRdoccw6mQsy5+KAzg5OYFbO3kjcl0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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