SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380f117a72f607669176a21b574faf38dedebe022805084673cb3a00b3bd4043' 
  AND token = 'wh7WGlKsSSLi8M/qE9ZxNIhbVUHoAVlv4ZiK8FjwjCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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