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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '919176787f57c22128bcc64434beba303ea0eba415344eebf036d01908941528' 
  AND token = 'w0p3X1aJKgc21H6XYdluRsHQCA5PRWiFhvi5hJ4R1ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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