Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee9784e0813034057b2f0f755a419b21e3002198b27dc8d999ad9f0c3a2929ce' 
  AND token = 'sPk4b1e9Yu9w0FyI+rK6pPj+HVJJ0bN0uZh9JjXnx4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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