Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a49162f03028f77c5cac232723e1ccacb7542490f23cc16af7dda795cb8b7de2' 
  AND token = 'F+rH86ETXUBwfHqFMPQvOTAqnpuqy+DdE8D4BhuJ/W8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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