Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c360488d2ac5a2b41be94f1756b0e82f229a7243bff243b26e4031153830693' 
  AND token = '8Qeb+DFyLe9tMik3yVu8S9B/S2KujAuWls7uB7qfrWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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