SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06ed48289a18ff7ccc4d21acd307302d95118ebac6e49234b0471938f8b9f19d' 
  AND token = 'F+dDAQnKaMYOEtQ/mPSz4KL6cvX46ULZqZd7rFYzgJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}